Check out the Buffalo Field Campaign website. http://www.buffalofieldcampaign.org/
In their "Updates from the Field" they have a by the numbers at the bottom that is the best resource I have found. The antis can be a lot of help sometimes haha.
My Dad was fortunate enough to draw a tag this year. Luckily the bison came out of the park during the last week of the season. He harvested this bull. Like Randy said we observed the tribes practicing some pretty questionable hunting ethics. This is the second West Yellowstone bison my dad...